What is the difference between replacement windows and new construction windows?

Can I use new construction to replace two kitchen windows that are weighted windows? Any tips on doing this? I am remodeling the kitchen, so I have the trim removed and the window frame is showing.

Replacement windows generally do not have a nail-fin for installation and are installed with fasteners through the sash. New Construction windows have the nailfin and are usually installed directly to the sheathing or framing under the exterior siding. If you can get the siding removed or use a slightly smaller window than the existing - The windows with the nail-fins are much better for protection against water infiltration. This being said - a quality replacement window and experienced installer can provide you with an excellent installation with zero problems.

I think you meant that "Replacement Windows are installed with fasteners through their frame", not the sash. I also wanted to add that most replacement windows are not purchased from a size schedule and are typically custom made per the exact measurement of your openings. Report Abuse

It depends on the brand and type of window you`re replacing them with. Are the existing jambs in good shape and estetically proper for the dwelling? If so it may be as easy as removing the sashes and parting stripes and installing the appropriate sized unit in the opening. Feel free to Email with further questions.

New contruction windows are the ones you got when your home was first built. Replacement windows are what you're going to replace them with. You can replace a new constuction window with an identical window and it would, be a replacement window. Nothing more. Usually though, replacement windows are a better quality that the originals. Most people replace their old windows for a better insulting factor or sometimes they want a larger window than the original. Unless you have pretty good carpentry skills, don't try to replace your own windows. There will be trim and siding issues to address and I think you'll find in the long run that it will be worth the money to have someone do it for you.

easy.....new construction windows r mostly standard sizes ex: 3'0 x 4'6".......and they have a nailing fin on them if they r vinyl...

replacement windows r mostly a 1/2 smaller in size so as to fit in the wooden frame and have no nail fin if vinyl.......and these windows can be made to fit.....

lic. gn. contractor

There is no difference. All windows now come framed. If they fit in the opening, then they fit. If not, work on the rough framing until they do.

new construction = windows go in then the siding. typically a less expensive, cheaper grade window.

replacement = home siding has been done. the old windows are taken out and new 'replacement' windows are installed. i think these are a bit smaller and need to be wrapped after installation.
replacement also are typically going to be more energy efficient and most will have some type of argon gas between the glass. (so it won't break as easily or heat/cold get through)